Growth chambers

We use Percival I-35LLVL growth chambers for both Arabidopsis growth
and tissue culture. It works fine for intial growth of plants, but
when they get older it may be that they could use some red light not
provided by the fluorescent lights as our plants grown outside the
chamber do a bit better. The I-37 has the same lights as the I-35 but
is bigger so light intensity will be lower (the catalog says 700 fc for
the 35 and 595 fc for the 37).
Chuck Gasser